Geologic units in Ashley county, Arkansas

Terrace deposits (Late Pleistocene) at surface, covers 56 % of this area

Alluvial deposits on one or more terrace levels

Alluvium - Alluvial deposits of local streams or of overbank flow of major streams (Holocene) at surface, covers 20 % of this area

Alluvial deposits of local streams or of overbank flow of major streams - In some areas includes deposits in abandoned meanders of major streams

Alluvium (Holocene) at surface, covers 17 % of this area

Alluvial deposits of present streams

Alluvium - Alluvial deposits in major stream channels or in mappable meanders of major streams (Holocene) at surface, covers 7 % of this area

Alluvial deposits in major stream channels or in mappable meanders of major streams - Includes alluvial deposits in natural levees in some areas.

Jackson Group (Late Eocene) at surface, covers 0.5 % of this area

Jackson Group

Claibourne Group (Middle Eocene) at surface, covers 0.1 % of this area

Claibourne Group

Braided Stream Terraces (Pleistocene) at surface, covers < 0.1 % of this area

Light gray, tan and brown fine to coarse sand; some clay silt and gravel.

Alluvium (Holocene) at surface, covers < 0.1 % of this area

Gray to brownish gray clay and silty clay, reddish brown in the Red River Valley, some sand and gravel locally.